*Cover A
**Appearing on the cover are:
***Dani Shpak
***Erin Gilbert from the 2016 movie.
***Winston Zeddemore from The Real Ghostbusters.
***Garrett Miller from Extreme Ghostbusters.
***Robo-Buster from Dimension 68-V.
***The Ghost Smasher's vehicle, seen back in Volume 1 Issue #13.
*Cover B
**The cover is a nod to Kenner's Classic Hero Ray packaging with Kylie Griffin as the toy.
**The orange KB Toys price tag is changed to "IDW 7 Cover B".
**Kylie, Pagan, and Braided Hair Ghost from The Real Ghostbusters are in place of Ray from The Real Ghostbusters and Wrapper Ghost.
**The cover artist's last name "Lattie" appears in place of "Kenner" and first name "Tim" in place of the trademark symbol "TM".
**The grammar is changed slightly from "I ain't 'fraid of no ghost" to "I ain't afraid of no ghost".
**"Ghostbusters Crossing Over" replaces "The Real Ghostbusters"
**The bottom of the packaging still has the "Action Zapping Ray with Nutrona Blaster"
**The Proton Pack has a purple proton stream instead of Ray's orange proton stream.
*Cover RI
**The cover features the Prime and 80-C teams.
**Winston has on the Proton Glove.
*What Came Before
**Mentioned are:
***The ghosts released in Issue #1.
***Containment Unit
***Makes light of the first paragraph being recycled from last issue.
***The call being answered in Issue #3.
***Tiamat
***The teams being mixed up in Issue #4.
***Encountering Rachel Unglighter in Issue #6.
***The Fire Goblins being trapped in Issue #6.
***Holtzmann being grabbed in Issue #5.
***Ron being injured at the end of Issue #5.
*Page 1
**In panel 3, by the oven is a Were-Chicken exactly like in Volume 1 Issue #2.
*Page 2
**The other Ghostbusters started shooting at the orphanage last issue.
**Peter forgives Holtzmann for the explosion in Issue #1.
**Peter also made a crack about Holtzmann's gray hairs on page 17 of Ghostbusters 101 #5.
*Page 3
**Peter does his Dah! yell.
**On panel 2, the chalkboard references several things exactly like in Volume 1 Issue #2:
***Chef Sargossa from Ghostbusters: The Video Game Stylized Versions.
***Hotel de Gustav from Ghostbusters: The Video Game Realistic Versions.
***Chicken Bane Soup from The Real Ghostbusters episode "Poultrygeist".
**On panel 3, the bottom part of the Chicken Bane Soup recipe can be seen.
*Page 4
**Bridget's instincts about the paranormal were noted in her Virtual Trading Card, released on March 20, 2018.
**Roland's confidence in the Ghostbusters' technology is a trait carried over from the Extreme Ghostbusters series.
**Peter alludes to when Egon 68-R and Roland detected traces of a Class 7 on page 3 of Issue #4.
*Page 5
**Ray 68-R alludes to Garrett battling the Hungry Manitou on the mental plane last issue.
*Page 6
**Ron mentions the Proton Grenades. He used them in Issue #5.
**In panel 4, Ray's hair is miscolored blonde - a nod to the animation errors on The Real Ghostbusters.
*Page 8
**In panel 3, on the rear of one of the caravans is Luis Delgado's 15 easter egg.
**Garrett uses full stream on the Manitou like the end of the Extreme Ghostbusters episode "Darkness at Noon, Part Two".
*Page 10
**Ray 68-R mentions his dimension's Janine and her recurring ghostbusting seen on The Real Ghostbusters.
***The Janines briefly met in Ghostbusters International #8.
*Page 11
**Abby refers to poet John Keats.
*Page 12
**In panel 2, once again, is the chess set from the movie "The Seventh Seal".
*Page 13
**Egon alludes to "The Seventh Seal" and several details of the movie.
*Page 14
**Death was previously trapped in a backpack by Egon's college friend Eugene Visitor and freed in Volume 1 Issue #15.
**The spectral bottleneck was a subject of the first volume of the ongoing series.
*Page 15
**In panel 2, once again, in the background is the Elsinore Castle from "Strange Brew" like in Issue #4.
*Page 16
**In panel 1, the street sign is still Kent Street, changed back from Kemp since Teenage Mutant Ninja Turtles/Ghostbusters 2 Issue #3.
**In panel 1, on the right is Janine's car from the latter half of The Real Ghostbusters.
**Egon 68-E alludes to the incident in "The Fly", which was previously referenced in Teenage Mutant Ninja Turtles/Ghostbusters.
**Mike alludes to Walter Peck.
*Page 17
**In panel 1, the Containment Unit Monitor from The Real Ghostbusters episodes "When Halloween Was Forever" and "X-Mas Marks The Spot" is on the console by Zoe.
**In panel 2, the red screens and "Sorry this sneak peeks been slimed!" text behind Zoe are the default art for the sticker boxes from Diamond Publishing's The Real Ghostbusters Sticker Album.
*Page 19
**The Ghostbusters end up in the Collectors' Limbo, last seen in Teenage Mutant Ninja Turtles/Ghostbusters 2 Issue #1.
**Egon mentions when he detected Tiamat's signature in Issue #4 on page 4.
*Page 20
**The final page is similar to Ghostbusters Get Real #3, the antagonist appears to the teams in a giant form on the last page right before the finale.
*Page 21
**The 00-D designation was first revealed in the Virtual Trading Card #40, released on July 5, 2018.
**Mentioned in the memo are:
***Meeting the Ghostbusters 00-D in Issue #6.
***The Headless Horseman
***Central Park 00-D
***The Brothers Grimm
***Frederick Law Olmstead, the co-designer of Central Park.
****There appears to be an extraneous vertical bar before his name in the memo.
***Rachel Unglighter
***Koza'rai
***Gozer
***Defeating Koza'rai in Ghostbusters Displaced Aggression #4.
***Louis Tully 00-D
***Rachel meeting Louis 00-D was revealed Virtual Trading Cards #47 and 48, released on July 31 and August 2, 2018 respectively.
***Exorcising Peter 68-R and trapping the Horseman took place in Issue #6.
***Trap Sphere
***Rachel's warning to Ray was also in Issue #6.
**Rachel's photo is from Issue #6, page 16, panel 3.
**Louis' photo is from Issue #6, page 16, panel 3.
*Page 22
**Cover RI of Issue #8 is previewed instead of Cover A.
This Post Contains Spoilers